The tank is for emergency use. My wife and I are full time caregivers for out DAV son. He came home broken from Iraq in '06. At least we still have him with us. Anyway, we are on a community water system. Seems odd for this area, but that is how it was when we got here. Since the system is not guaranteed, we put the tank in just in case something catastrophic happens to the system. This gives us a buffer so we wouldn't have to bail in a dire emergency.
The land is surrounded mostly by BLM, but is private. The town was created in 1907. It has never been a ghost town, but has come close. There are only 8 of us or so full time residents now.
We are surrounded by 'mountains' on all sides. We are at 5700 feet and the ridge above us is a couple of thousand higher. The highest peak in the area is just over 10,000 and is east of us maybe 50 miles. We are very lucky to have this bit of paradise. Most of the really good land in NV is government owned. We have black, rich soil and trees and just a hundred feet or so above the bottom of our canyon the soil is typical rocky desert.